2

Sialocele:
It's quite common to have a blocked minor salivary gland which will fill with a clear mucus material. They can spontaneously rupture and then recur. Sometimes they can be treated with cauterizing or silver nitrate in the office with your ENT specialist. They usually are of no major concern or significance. As always, seeing the problem is helpful, so get checked by an ENT md.
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3

Blister Location?:
It would be more helpful to tell me where the blisters are located? Are they on the hands, feet, elbows, back, legs? Knowing the location and that they occurred after sports would provide more clues about the correct diagnosis and then treatment. Thanks for your question.
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11

Need biopsy:
The base of these needs to be scraped and examined under the microscope for cells with inclusion bodies. Hand foot and mouth disease usually has a maculopapular rash caused by intestinal viruses of the picornaviridae family. commonly Coxsackievirus A16 and Enterovirus 71 but these are seldom painful. See a dermatologist. Best wishes.
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14

'Spider" bite:
A recurring area of blistering with fluid may not be due to a bug or spider bite, but rather to a localised viral infection called herpes simplex. If you see your doctor when the blisters are present a culture of the fluid can be done to confirm if it is herpes. If it is then treatment can be prescribed. Hsv is an annoying but not serious condition.
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15

Blisters In Children:
Blisters in children can have many causes: infectious as in bullous staph, frictional blisters from rubbing, blistering diseases which tend to be genetic, viral infections which cause blisters. If the blister persist a biopsy and blood work is needed and you may want to see a pediatric dermatologist.
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17

Depends on if pus:
If the fluid in the blister is only something like serum, then it should clear out if few days to a weeks. If the fluid is pus, then it needs to be lanced and drained and might need antibiotics. The fluid in this case is associated with redness of skin and pain.
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18

Aphthae:
Don't worry. Not due to food or stress. Not infection. Nothing you need to do. You will reach a time when they will stop. Remember the last time you saw a celebrity begging for donations to the national aphthous stomatitis society? Right. Nobody has money for research into the cause or treatment of it. We know very little about it. Remember that when someone wants to sell you a magic cure for it.
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19

Yes:
You can be allergic to almost anything. If the rash you're describing lines up with the bra, then this would be suggestive that it is that part of the bra. Stop wearing the bra and it should go away with time.
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